"Authentication Method" claim values when AAD is the IdP in a SAML federation and MFA is required.

Hi,

I cannot locate a Microsoft document that will tell me the range of possible values that Azure AD asserts as an IdP  in the "Authentication Method" claim in the SAML Assertion.

In particular I want  a SAML assertion/claim that will tell the Service Provider  that the Azure AD user authenticated with MFA.

Any help appreciated.

Thanks,

David.